2313131231 has 16 divisors (see below), whose sum is σ = 2586504960. Its totient is φ = 2055761280.

The previous prime is 2313131221. The next prime is 2313131281. The reversal of 2313131231 is 1321313132.

It is a cyclic number.

It is not a de Polignac number, because 2313131231 - 2¹⁰ = 2313130207 is a prime.

It is a super-2 number, since 2×2313131231² = 10701152183655150722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2313131201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88940 + ... + 111966.

It is an arithmetic number, because the mean of its divisors is an integer number (161656560).

Almost surely, 2^2313131231 is an apocalyptic number.

2313131231 is a deficient number, since it is larger than the sum of its proper divisors (273373729).

2313131231 is a wasteful number, since it uses less digits than its factorization.

2313131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23374.

The product of its digits is 324, while the sum is 20.

The square root of 2313131231 is about 48095.0229337714. The cubic root of 2313131231 is about 1322.5134294659.

Adding to 2313131231 its reverse (1321313132), we get a palindrome (3634444363).

The spelling of 2313131231 in words is "two billion, three hundred thirteen million, one hundred thirty-one thousand, two hundred thirty-one".